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amg4psblas/mlprec/impl/mld_s_smoothers_bld.f90

316 lines
13 KiB
Fortran
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!
!
! MLD2P4 version 2.2
! MultiLevel Domain Decomposition Parallel Preconditioners Package
! based on PSBLAS (Parallel Sparse BLAS version 3.5)
!
! (C) Copyright 2008-2018
!
! Salvatore Filippone
! Pasqua D'Ambra
! Daniela di Serafino
!
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions
! are met:
! 1. Redistributions of source code must retain the above copyright
! notice, this list of conditions and the following disclaimer.
! 2. Redistributions in binary form must reproduce the above copyright
! notice, this list of conditions, and the following disclaimer in the
! documentation and/or other materials provided with the distribution.
! 3. The name of the MLD2P4 group or the names of its contributors may
! not be used to endorse or promote products derived from this
! software without specific written permission.
!
! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE MLD2P4 GROUP OR ITS CONTRIBUTORS
! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! POSSIBILITY OF SUCH DAMAGE.
!
!
! File: mld_s_smoothers_bld.f90
!
! Subroutine: mld_s_smoothers_bld
! Version: real
!
! This routine performs the final phase of the multilevel preconditioner
! build process: builds the "smoother" objects at each level,
! based on the matrix hierarchy prepared by mld_s_hierarchy_bld.
!
! A multilevel preconditioner is regarded as an array of 'one-level'
! data structures, each containing the part of the
! preconditioner associated to a certain level,
! (for more details see the description of mld_Tonelev_type in mld_prec_type.f90).
! The levels are numbered in increasing order starting from the finest one, i.e.
! level 1 is the finest level. No transfer operators are associated to level 1.
! Each level provides a "build" method; for the base type, the "one-level"
! build procedure simply invokes the build method of the first smoother object,
! and also on the second object if allocated.
!
!
! Arguments:
! a - type(psb_sspmat_type).
! The sparse matrix structure containing the local part of the
! matrix to be preconditioned.
! desc_a - type(psb_desc_type), input.
! The communication descriptor of a.
! p - type(mld_sprec_type), input/output.
! The preconditioner data structure containing the local part
! of the preconditioner to be built.
! info - integer, output.
! Error code.
!
! amold - class(psb_s_base_sparse_mat), input, optional
! Mold for the inner format of matrices contained in the
! preconditioner
!
!
! vmold - class(psb_s_base_vect_type), input, optional
! Mold for the inner format of vectors contained in the
! preconditioner
!
!
!
subroutine mld_s_smoothers_bld(a,desc_a,prec,info,amold,vmold,imold)
use psb_base_mod
!use mld_s_inner_mod
use mld_s_prec_mod, mld_protect_name => mld_s_smoothers_bld
Implicit None
! Arguments
type(psb_sspmat_type),intent(in), target :: a
type(psb_desc_type), intent(inout), target :: desc_a
class(mld_sprec_type),intent(inout),target :: prec
integer(psb_ipk_), intent(out) :: info
class(psb_s_base_sparse_mat), intent(in), optional :: amold
class(psb_s_base_vect_type), intent(in), optional :: vmold
class(psb_i_base_vect_type), intent(in), optional :: imold
! Local Variables
integer(psb_ipk_) :: ictxt, me,np
integer(psb_ipk_) :: err,i,k, err_act, iszv, newsz, casize, nplevs, mxplevs
real(psb_spk_) :: mnaggratio
integer(psb_ipk_) :: ipv(mld_ifpsz_), val, coarse_solve_id
integer(psb_ipk_) :: int_err(5)
integer(psb_ipk_) :: debug_level, debug_unit
character(len=20) :: name, ch_err
info=psb_success_
err=0
call psb_erractionsave(err_act)
if (psb_errstatus_fatal()) then
info = psb_err_internal_error_; goto 9999
end if
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
name = 'mld_s_smoothers_bld'
info = psb_success_
int_err(1) = 0
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Entering '
!
if (.not.allocated(prec%precv)) then
!! Error: should have called mld_sprecinit
info=3111
call psb_errpush(info,name)
goto 9999
end if
!
! Check to ensure all procs have the same
!
iszv = size(prec%precv)
call psb_bcast(ictxt,iszv)
if (iszv /= size(prec%precv)) then
info=psb_err_internal_error_
call psb_errpush(info,name,a_err='Inconsistent size of precv')
goto 9999
end if
if (iszv < 1) then
! We should never get here.
info=psb_err_from_subroutine_
ch_err='size bpv'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
endif
!
! Issue a warning for inconsistent changes to COARSE_SOLVE
! but only if it really is a multilevel
!
if ((me == psb_root_).and.(iszv>1)) then
coarse_solve_id = prec%precv(iszv)%parms%coarse_solve
select case (coarse_solve_id)
case(mld_umf_,mld_slu_)
if (prec%precv(iszv)%sm%sv%get_id() /= coarse_solve_id) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse solver was requested as ',&
& mld_fact_names(coarse_solve_id)
if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then
write(psb_err_unit,*) ' but I am building BJAC with ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
end if
write(psb_err_unit,*) 'This may happen if: '
write(psb_err_unit,*) ' 1. coarse_subsolve has been reset, or '
write(psb_err_unit,*) ' 2. the solver ', mld_fact_names(coarse_solve_id),&
& ' was not configured at MLD2P4 build time, or'
write(psb_err_unit,*) ' 3. an unsupported solver setup was specified.'
end if
if (prec%precv(iszv)%parms%coarse_mat /= mld_repl_mat_) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse matrix was requested as replicated', &
& ' but it has been changed to distributed.'
end if
case(mld_ilu_n_, mld_ilu_t_,mld_milu_n_)
if (prec%precv(iszv)%sm%sv%get_id() /= mld_ilu_n_) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse solver was requested as ',&
& mld_fact_names(coarse_solve_id)
if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then
write(psb_err_unit,*) ' but I am building BJAC with ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
end if
write(psb_err_unit,*) &
&'This may happen if coarse_subsolve has been reset'
end if
if (prec%precv(iszv)%parms%coarse_mat /= mld_repl_mat_) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse solver was requested as ',&
& mld_fact_names(coarse_solve_id),&
& ' but the coarse matrix has been changed to distributed'
end if
case(mld_mumps_)
if (prec%precv(iszv)%sm%sv%get_id() /= mld_mumps_) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse solver was requested as ',&
& mld_fact_names(coarse_solve_id)
if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then
write(psb_err_unit,*) ' but I am building BJAC with ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
end if
write(psb_err_unit,*) 'This may happen if: '
write(psb_err_unit,*) ' 1. coarse_subsolve has been reset, or '
write(psb_err_unit,*) ' 2. the solver ', mld_fact_names(coarse_solve_id),&
& ' was not configured at MLD2P4 build time, or'
write(psb_err_unit,*) ' 3. an unsupported solver setup was specified.'
end if
case(mld_sludist_)
if (prec%precv(iszv)%sm%sv%get_id() /= coarse_solve_id) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse solver was requested as ',&
& mld_fact_names(coarse_solve_id)
if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) then
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else if (prec%precv(iszv)%parms%coarse_mat == mld_distr_mat_) then
write(psb_err_unit,*) ' but I am building BJAC with ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
else
write(psb_err_unit,*) ' but I am building ',&
& mld_fact_names(prec%precv(iszv)%sm%sv%get_id())
end if
write(psb_err_unit,*) 'This may happen if: '
write(psb_err_unit,*) ' 1. coarse_subsolve has been reset, or '
write(psb_err_unit,*) ' 2. the solver ', mld_fact_names(coarse_solve_id), &
& ' was not configured at MLD2P4 build time, or'
write(psb_err_unit,*) ' 3. an unsupported solver setup was specified.'
end if
if (prec%precv(iszv)%parms%coarse_mat /= mld_distr_mat_) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse solver was requested as ',&
& mld_fact_names(coarse_solve_id),&
& ' but the coarse matrix has been changed to replicated'
end if
case(mld_bjac_,mld_jac_)
if (prec%precv(iszv)%parms%coarse_mat /= mld_distr_mat_) then
write(psb_err_unit,*) &
& 'MLD2P4: Warning: original coarse solver was requested as ',&
& mld_fact_names(coarse_solve_id),&
& ' but the coarse matrix has been changed to replicated'
end if
case default
! We should never get here.
info=psb_err_from_subroutine_
ch_err='unkn coarse_solve'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end select
end if
! Sanity check: need to ensure that the MUMPS local/global NZ
! are handled correctly; this is controlled by local vs global solver.
! From this point of view, REPL is LOCAL because it owns everyting.
! Should really find a better way of handling this.
if (prec%precv(iszv)%parms%coarse_mat == mld_repl_mat_) &
& call prec%precv(iszv)%sm%sv%set('MUMPS_LOC_GLOB', mld_local_solver_,info)
!
! Now do the real build.
!
do i=1, iszv
!
! build the base preconditioner at level i
!
call prec%precv(i)%bld(info,amold=amold,vmold=vmold,imold=imold)
if (info /= psb_success_) then
write(ch_err,'(a,i7)') 'Error @ level',i
call psb_errpush(psb_err_internal_error_,name,&
& a_err=ch_err)
goto 9999
endif
end do
if (debug_level >= psb_debug_outer_) &
& write(debug_unit,*) me,' ',trim(name),&
& 'Exiting with',iszv,' levels'
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine mld_s_smoothers_bld
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